Code written for OpenGL 1.x and 2.x should work fine with a 3.2+ compatibility profile. It won't work with a 3.2+ core profile. The online reference pages for OpenGL 4 (https://www.khronos.org/registry/OpenGL-Refpages/gl4/) only describe the core profile. If a function isn't listed there, it isn't available in the core profile.

Note that the compatibility profile isn't available on all platforms. In particular MacOS doesn't have it; you have a choice between OpenGL 2.1 and OpenGL 3/4 core profile. So if you want to use 3+ features in code which should run on a Mac, you need to use the core profile.

None of this should matter if you're running legacy (OpenGL 1/2) code.

sevenfold

10-12-2017, 02:58 PM

Thanks for the info. Just wondering if these new drivers were ripping out old functions and causing my program to crash. Must be something else.

mhagain

10-12-2017, 11:32 PM

If your program is crashing you're better off using a proper debugger and finding out why.

sevenfold

10-13-2017, 03:14 PM

If your program is crashing you're better off using a proper debugger and finding out why.

I wouldn't be asking for info if that was possible. AMD Drivers have always been flaky, and I don't trust them enough to maintain old functions for the future.